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- W2024264502 abstract "Neonatal mice, under fasting conditions, are susceptible to the development of lesions in the arcuate nucleus (AN) of the hypothalamus, with high doses of monosodium L-glutamate (MSG). Feeding of nutrients (e.g., sugars and L-amino acids) has been shown to have a protective effect against the development of these lesions. The purpose of these studies was to elucidate the mechanism of this protective effect. Histopathologic examination of lesions of the AN demonstrated that feeding of weaning mice before subcutaneous administration of toxic doses of MSG suppressed the development of these lesions, as compared to fasted controls. Similarly, the number of necrotic cells in the AN of neonates administered toxic doses of MSG subcutaneously was reduced when D-glucose and L-arginine were administered orally. Atropine obliterated the protective effect of D-glucose. Pretreatments consisting of gastric inhibitory polypeptide (GIP) + oral D-glucose had a protective effect of higher potency than GIP alone. Pretreatments with insulin, anorexigenic peptide (pyroGlu-His-Gly), cholecystokinin, glucagon, bombesin, and substance P (in decreasing order of effectiveness) demonstrated a protective effect against the AN lesion in neonates, whereas somatostatin and β-endorphin had no effect. Results suggest that the protective effect of nutrients may in part be due to the stimulation of peptide hormone release during the postabsorptive phase. It is postulated that the effect of entero-pancreatic hormone, especially insulin, is to enhance the tolerance of AN neurons of neonatal mice to the toxic dose of L-glutamate." @default.
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- W2024264502 date "1987-04-01" @default.
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- W2024264502 title "Mealing and related hormone release suppress hypothalamic lesions of neonatal mice by L-glutamate" @default.
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- W2024264502 doi "https://doi.org/10.1016/0361-9230(87)90118-3" @default.
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